I do a calculation of the electrical machine so I use 90deg model but the fan. Because of different angles between blades, I have to make 180deg model of the fan.

After the calculation I got results that look strange. I have to say that the mesh is of good quality. My question is how are the variable values transformed from 90deg to 180deg? Because on the picture you can see bad transition between two domain. Both doamins rotate.